Toyota Tundra. Manual — part 1488



With "ALL READINESS" you can check whether or not the DTC judgment has been completed by
using the Techstream.



You should check "ALL READINESS" after simulating malfunction symptoms or for validation
after finishing repairs.

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON.

c. Turn the Techstream ON.

d. Clear the DTCs (see DTC CHECK/CLEAR ).

e. Perform the DTC judgment driving pattern to run the DTC judgment.

f. Enter the following menus: Powertrain/Engine and ECT/Utility/All Readiness.

g. Input the DTCs to be confirmed.

h. Check the DTC judgment result.

DISPLAY ITEM AND DESCRIPTION

DTC CHECK/CLEAR

HINT:



DTCs which are stored in the ECM can be displayed on the Techstream. The Techstream can display the
current and pending DTCs.



Same DTCs are not set if the ECM does not detect the same malfunction again during a second
consecutive driving cycle. However, such malfunctions, detected on only one occasion, are stored as
pending DTCs.

Display Item

Description

NORMAL



DTC judgment completed



System normal

ABNORMAL



DTC judgment completed



System abnormal

INCOMPLETE



DTC judgment not completed



You should perform driving pattern after confirming DTC enabling
conditions

UNKNOWN



Unable to perform DTC judgment



Number of DTCs which do not fulfill DTC preconditions has reached
ECU'S memory limit

NOTE:

When the diagnosis system is changed from the normal mode to check mode or
vice versa, all DTCs and freeze frame data recorded in normal mode are erased.
Before changing modes, always check and make a note of DTCs and freeze
frame data.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

1. CHECK DTC

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON.

c. Turn the Techstream ON.

d. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.

e. Check the DTC(s) and freeze frame data, and then write them down.

f. Check the details of the DTC(s) (see DIAGNOSTIC TROUBLE CODE CHART ).

2. CLEAR DTC

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON.

c. Turn the Techstream ON.

d. Enter the following menus: Powertrain/Engine and ECT/DTC/Trouble Codes.

e. Erase the DTCs.

HINT:

After clearing the DTCs, the engine may become difficult to start if the concentration of alcohol in
the fuel is high. Therefore, it may be necessary to crank the engine a few times before it starts.

3. CLEAR DTC (Without using the Techstream)

a. Perform either of the following operations:

1. Disconnect the negative battery cable for more than 1 minute.

2. Remove the EFI NO. 1 fuse and ETCS fuse from the engine room relay block located inside

the engine compartment for more than 1 minute.

FREEZE FRAME DATA

1. DESCRIPTION

Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature,
fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, it can
help determine if the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio
was Lean or Rich, and other data from the time the malfunction occurred.

HINT:

If it is impossible to duplicate the problem even though a DTC is output, confirm the freeze frame data.

The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the
Techstream, 5 separate sets of freeze frame data can be checked.



3 data sets before the DTC was set.



1 data set when the DTC was set.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra



1 data set after the DTC was set.

These data sets can be used to simulate the condition of the vehicle around the time of the
occurrence of the malfunction. The data may assist in identifying the cause of the malfunction, and
in judging whether it was temporary or not.

2. LIST OF FREEZE FRAME DATA

Fig. 34: Freeze Frame Data
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

FREEZE FRAME DATA

Tester Display

Measurement Item

Diagnostic Note

Vehicle Speed

Vehicle speed

Speed indicated on speedometer.

Engine Speed

Engine speed

-

Calculate Load

Calculated load

Calculated load by ECM.

Vehicle Load

Vehicle load

-

MAF

Mass air flow volume

If approximately 0.0 g/sec.:



Mass air flow meter power source circuit
open or short.



VG circuit open or short.

If 160.0 g/sec. or more:



E2G circuit open.

Atmosphere
Pressure

Atmosphere pressure

-

Coolant Temp

Engine coolant temperature

If -40°C (-40°F), sensor circuit open.
If 140°C (284°F) or more, sensor circuit shorted.

Intake Air

Intake air temperature

If -40°C (-40°F), sensor circuit open.
If 140°C (284°F) or more, sensor circuit shorted.

Ambient
Temperature

Ambient Temperature

-

Engine Run Time

Accumulated engine running

-

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

time

Initial Engine
Coolant Temp

Engine coolant temperature at
engine start

-

Initial Intake Air
Temp

Intake air temperature at engine
start

-

Battery Voltage

Battery voltage

-

Accel Sens. No. 1
Volt %

Absolute Accelerator Pedal
Position (APP) No. 1

-

Accel Sens. No. 2
Volt %

Absolute APP No. 2

-

Throttle Sensor
Volt %

Throttle position

-

Throttle Sensor #2
Volt %

Throttle sensor positioning #2

-

Throttle Sensor
Position

Throttle sensor positioning

-

Throttle Motor
DUTY

Throttle motor

-

Injector (Port)

Injection period of No. 1
cylinder

-

Injection Volum
(Cylinder 1)

Injection volume

-

Fuel Pump/Speed
Status

Fuel pump/speed status

-

Vacuum Pump

Key-off EVAP system leak
detection pump status

Refer to EVAP SYSTEM .

EVAP (Purge)
VSV

EVAP purge VSV duty ratio

-

Evap Purge Flow

Ratio of evaporative purge flow
to intake air volume

-

Purge Density
Learn Value

Learning value of purge density

-

EVAP System
Vent Valve

Key-off EVAP system vent
valve status

-

EVAP Purge VSV EVAP Purge VSV

-

Target Air-Fuel
Ratio

Ratio compared to
stoichiometric level

-

AF Lambda B1 S1 Fuel trim at A/F sensor

-

AF Lambda B2 S1 Fuel trim at A/F sensor

-

AFS Voltage B1
S1
AFS Voltage B2
S1

A/F sensor output

Performing Control the Injection Volume or Control
the Injection Volume for A/F Sensor function of
Active Test enables technician to check output
voltage of sensor.

AFS Current B1

A/F sensor current

-

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra